Validate a transaction

POST

https://sei-tendermint.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Checks signed transaction bytes without broadcasting. This historical transaction returns a nonzero code because its account sequence has already been used. It is not invoked while validating this specification because it may submit data or change node state.

Body

application/json

JSON-RPC request for check_tx.

jsonrpcstring2.0required

JSON-RPC protocol version.

idintegerrequired

Client request identifier.

methodstringcheck_txrequired

RPC method name.

paramsobjectrequired

Parameters accepted by check_tx.

Show child attributes

txstring

Base64-encoded transaction bytes.

Response

200OK

Successful JSON-RPC response. A live example is omitted because CheckTx submits transaction bytes to the mempool validator.

400Bad Request

Invalid JSON-RPC request.

Validate a transaction

curl -X POST 'https://sei-tendermint.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "check_tx",
    "params": {
      "tx": "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"
    }
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://sei-tendermint.nownodes.io/");
const result = await provider.send("check_tx", {
  "tx": "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"
});
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://sei-tendermint.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "check_tx",
  "params": {
    "tx": "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"
  },
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://sei-tendermint.nownodes.io/"))
response = w3.provider.make_request("check_tx", {
  "tx": "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"
})
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://sei-tendermint.nownodes.io/"),
});

const result = await client.request({
  method: "check_tx",
  params: {
  "tx": "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"
},
});

console.log(result);

const endpoint = "https://sei-tendermint.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "check_tx", params: {
  "tx": "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"
}, id: 1 });
console.log(result);

const response = await fetch('https://sei-tendermint.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "check_tx",
      "params": {
        "tx": "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"
      }
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "check_tx",
  "params": {
    "tx": "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"
  }
}

response = requests.post('https://sei-tendermint.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://sei-tendermint.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "check_tx",
    "params": {
      "tx": "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"
    }
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "check_tx",
  "params": {
    "tx": "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"
  }
}

{}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params"
  }
}